Process for forming ribbed expanded metal.



J. ,KAHN

PRGESSTOR FORMNG REBBED EXPANDED METAL.

APPLICATION FILED APB..5,1909.

Pateiutedv Dec. 14, 1909.

2 SHEETS-SHEET 1.

Mpesses:

J. KAHN'. A PROCESS FOR FORMING RIBBED EXPANDED M ETAL.

' APPLICATION FILED APR.5,1909.

Patented Dec. 14, 1909.

'To all I12J/ioni it muy emmer/L.'

Temes KAHN, 0F DETROIT, memoria, assioma To mussen CONCRETE STEEL COMPANY, cammen, mexicana CORPORATION or MICHIGAN.

"ROCESS FOR FORMNG .RIBBED EXPANDED METAL.

ait-sm specification Dinnershow rammen nee. 14, ieee. Application filed April 5, 1909. Serial No. 488.103.

ln the prowess described in the Kane patent, the sheet is next passed through the '/.en ot' the United States, and a resident of grooving dies. hereby the sheet is expand- .Detroit` in the county of Tt'Vayne and State ed. lt hasI hen t'ound that it is often.im of Michigan, have invented a newand llnpossible to obtain the maximum amount; of 60 proved Process for Forming Ribbed EX- expansion for a 'given number and size of Be it known that l, Jlfmi's Kxnxga citipanded Metal, of which the following' is, a ribs by the Kane process. 'lo obtain this Iprocess described in Patent No. 920,152,

' ent` the size of the ribs is in lixed proportion properly slittcd previous toA expanding.

specification. g maximum expansion, the outer edges ofy This invention relates to the manufacture the sheet shownin Figs. 2, 3 and 4 are of that type of expanded metal disclosed in drawn apart, causing the tongues 6 to 65 Patent No. 862,897 to Forsyth,l (lated Anl open as shown in Fig. The partly exg'ust .13th, 1907',y and is a modification of the I panded sheet is then passed through the ribhing dies, as described in the Kanepatent, dated May Llt-h, 1909, to Kane. resulting in the ribs 10, shown yin cross Sec- '.lhe object of my improved process is to tion in `Fig. The sheet receives its final 70 produ a ribbed expanded metal wherein expansion by these dies, and the amount that', the ribs oi any desired size ma): be spaced each rcticulat'ed band is expanded is equal to considerable distances apart. the difference between 4the distance between In the process described in the Kane pat;i the points 8 and 9, around the rib 10, and

'straight across. 75 The difference in the resulting' expansion' of the sheets according to the Kane process that the ribs he of such size that to form and according to the process above set forth them on the metal sheet" in the manner exis`that-` given to the sheet before the ribs are plained in said patent would be inetl'ectual 1 formed. By using' the Kane process, a sheet'l 80 to properly expandthemctal. t having the same area for theI same weight ln the aecompanving drawing, Figure 1V i could he formed, but the ribs would be is `a plan of a portion ot a sheet: ot metal spaced close together and would be smaller. 'lhis present process permits oi fewer ribs Fig. 2 is a plan otr the sheet. ai'ter the ttmgues for the same area of expanifted metal. lt 85 that formed the connecting' ties have been i also gives greater area of expanded metal i pressed down. Fi". 3 is` a cross section on y for the same weight, with but slightly less the line 3-3 of Fig. 2. Fig. 41s a cross Seel l strength.

t llaving n'ou explained my improved to the amount the reticulated metal hetuf'cen the ribs'is expanded. it: is ot'ten desirable tion on the line 4f-4 of Fig. 2, both Figs. 3 and #l being' on a slightly larger scale than process, what fl claim as.my invention and 90 the others. Fig. 5 is a cross section onl ythe t desire to secure by Letters/PatentJ is saaie line as l-tig. il at'ter the lrst expansion. t. 'lhc process of formingribbed expandl".ig'. tl is a similar cross section at'ter the ed nutal, consisting in slitting the same to second expansion. Fig. is a plan of a lorm parallel hands ot" slitted portionsl sepasheet after such second expansion. rated by parallel grooved bands` ol' entire Similar reference clmrzuftcrs roter to like portions,- the slitting' being' along; longitudiparts throughout the several views. nal lines so as to form tonguesl split through As in thedorsyth patent, expanded metal their bases: then striking up the tongues so is formed by slitting a ,sheet 1 along' longithat tht` main portions will extend at practudinal lines. 'l'he transverse slits 2 connect tieally right angles to the sheet, the ends be- 100 g mg parallel to th(I sheet; then separating to the ends ot' longitudinal slits il and 4. the slits 25 extending hetu'en the slits t as shown l adjacent Aentire portions to cause the tongues in Fig'. 1. Blank portions 5 are lot't between to open; and then passing' the sheets' through tho bands ott slitted metal. 'lhe slittod I' grooying dies to form the entire portions metal. is next passed through the forming. into U-shaped ribs, at'l the same time pre- 105 press and the tongues are'presscd tlowinthe renting' the sheet from contracting .gener- .sheet then being in'the l'orm shownin Figs. ally, whereby the expanding of the slitted i3 and 3. At the same time, small grooves ands is completed.

7 are/formed in the blank portions 5 ol the v2. The process of forming ribbed expandsheet. y 1 ed metal which consists in forming a sheet 1110 with longitudinal series of slits and bands of entire inetal alternately, then separating the bands of entire metal to laterally expand the slitted portions, and then forcing all the bands of entire metal into the grooves of a dier simultaneously, thereby completing the expansion of the slitted portions.

3. The process of forming expanded sheet metal reinforced by longitudinal ribs eX- tending from one face of the saine, which consists in iirst slittino the sheet so as to form parallel bands ott? slitted metal separated by bands of entire metal7 then striking up portions of theslitted metal to form parallel rows of split tongues land forming small grooves down the middle line of the bands of entire metal, then laterally sepa rating the bands of entire metal therebyA opening the tongues, and then placing the sheet between dies having grooves and projecting tongues in sue-h a manner that a tongue on the dies Will enter each groove in the entire port-ion of tlJe sheet, and operating the dies to form ribs,'*the drawing in of the edges of the entire portions of the sheetcoinpleting the expansion of the slittecl portions. l

ln testimony whereof I have signed this specification in the presence of tWo subscribing Witnesses. Y

JULIUS KAI-IN, Witnesses l EDWARD N. PAGELSEN, H, H. SCOTT. 

